Shan'do Kael'thas Sunstrider shows the way to Druidism.

Too slow, unless triggered by Kael'thas Sunstrider 

2x Embiggen in one card, which costs 10  more mana. Dunno, maybe it finds place in some kind aggro druid?

Interesting mega-buff. Probably not for spell druid due to the lack of minions to be buffed. Could be used with Kael'thas Sunstrider, this expansion really seems like his time to shine!

Scary card, unless you're druid. Its hard to think up a place for this thing in druid. Basically, unless its cheated out Embiggen is just a better card.

The fact that other classes like priest, mage or rogue can get it is the real deal with this card.

So very strong. So very strange. In what deck would this see play? You need something to bring down the cost- or at least a lot of ramp to play it soon- but also a lot of minions. In the best case it is a win-more card, but mostly it is a lose-now card. But maybe there could be some kind of Big-Spell/Spiteful druid in wild?

A very expensive spell that does not change the board state unless you already had minions on the board.

Druids don't really need this kind of effect when embiggen already exists and sees very little play outside of hadronox decks.

Unlikely to see play, but the combo potential is more than zero, so it could be interesting to see how it plays out.

Embiggen buffs stuff in deck this buffs the board, hand and deck.

It's slow but it can be a finisher or cheated out with kaelthas as said by the first 2 commenters.. I think this has potential

seems like druid is gonna get some beasts that probably work well with buffs (seeing the dual class legendary)

Thief Rogue intensifies hard with this. Also insane with Tess in wild.

Sometimes I think that some cards are intended to work fine with other class archetypes, druid working well with spells having this is like trying to force a new archetype that, at least for the moment, doesnt seem viable. Let's see when the rest of the expansion is revealed.

Seems like it is designed to fit into a Swarm/Ramp deck, but those rely on spells to generate minion swarms, so the deck and hand buffs may not be all that impactful. Still, it's a powerful enough effect that it wouldn't take much to make it playable as a one-of.

So if I recall correctly we had a very decent Big Druid deck at the beginning of the Outland expansion that ran Bogbeam and the other 7-mana 0 cost spell alongside some other cheap stuff as fuel for Exotic Mountseller. Replace Mountseller with Kael'thas, add in Overflow and fill the rest of the deck with a Big Dragon Core and boom. Big Druid that actually scales into lategame thanks to this.  With enough 0-mana spells you can play Kael into Overflow into this in a single turn and just win from there. Makes all those 4-attack dragons into actual threats (which is what was previously an issue with the archetype, the lack of actual game ending threats)

technicaly posibble turn 3 -

2x new 0 mana innervates into[Hearthstone Card (Kael'thas Sunstrider ) Not Found] into new 10 mana spell :D

leave you 8/11 kaelthas on board and buff deck ... even if you dont do anything next turn due do overload :D seems fair 

I like it, obviously it is a big push if you have a board developed already (though that's unlikely as to get maximum value from this you will have to focus on ramping to either 7 mana for Kael'thas Sunstrider, or failing that pushing straight to 10). Mana ramp is this card's friend. Will it go the way of [Hearthstone Card (Mistcaller) Not Found] or are we looking at the new Prince Keleseth? Only time will tell

Same, I can only see this in a Kael'thas deck since in other scenarios you need minions alive in the board before your turn to not be "10 mana, I lose tempo"

Awesome in Spiteful Druid with Grand Archivist!

Looks like we have another U[Hearthstone Card (ltimate Infestation) Not Found] level druid card on our hands here. This is sure to benefit from mana ramp and beast combo together. So glad to see the return of beast druid support.

Way too slow for an aggro, especially when Druids have good ole Savage Roar available.

This is a tool for BIG Druid to make even BIGGER minions me thinks 

My initial impression is that it won't be good because it is 10 mana and requires you to already have a board and all that. But it will probably be fairly easy to cheat out. First of all, Druid has ramp. Also, there are cards like [Hearthstone Card (Kealthas Sunstrider) Not Found] and the new innervate. In wild this card also be used as a way to activate Spiteful Summoner. There are a handful of ways to utilize this card, and there will probably be a spell-cheating card in this set. I think this card has a lot of potential, but it definitely needs some support to be used.

With the amount of mana ramp available to Druid, and Kael'thas Sunstrider existing, this just might find a home. 

This feels like it competes too much with Embiggen at the moment. By the time you have 10 mana to play this, the increased mana cost of monsters from Embiggen stops mattering.

Isn’t Gift of the Wild already run in Spell Druid? This is basically that but with +4/+4 and no Taunt (and a minor upside of buffing minions in hand and deck). This seems like a really good card.

Seems like a REALLY strong card on paper, but i feel like it just isn't that strong in practice. Sure it's strong with Kael'thas Sunstrider, but what is is supposed to buff? Decks with Kael'thas Sunstrider often are spell-heavy meaning that you won't get much out of the deck/hand buffing aspect of the card. So i guess you would use it as a finisher? In that case why not use Savage Roar? Savage Roar is cheaper and does the same job with closing out games. I feel like the only real time you might play this card is if your ahead of you opponent, but even then, why would you cast this and effectively "lose" a turn while you can close out the game by building a bigger board? But at the end of the day, this is a 10 mana card in druid. And the 10 mana druid cards have always found a way to "break" the game. 

On the same note, this would be a great thing to cast off Puzzle Box of Yogg-Saron or Yogg himself. Edit: my comment was meant to be in response to the comment about use in a Spiteful deck with Grand Archivist.

I smell some even decks coming around the corner in wild.  With the spiteful/archivist package, you can run C'thun, Floop, and maybe even Twig variants.  

The effect is powerful but I can't see this succeed in standard with just Kael as a trigger. It might find a deck or two in wild though.

Keep in mind that this is a Druid card, which means it will likely be played at around turn 5. Its biggest issue is that the current token Druid runs mostly spells, so this card would just be a clunky Savage Roar in that deck. If druids can shift into a more minion centric approach to token druid, this can work there.

I'm trying to think of where this card goes and it seems like a less impressive version of Embiggen.  On 10 mana it'll be a scary find for Nature Studies, but not sure what deck would want to main deck this.  Maybe when Embiggen rotates this card will find a home?

Amazing with Kael'Thas, but too slow otherwise. Fun meme though.

Kael’thas is going to love this!

I mean its also quite a good finisher if you already have a board established at 10 mana say a board of 1/1s or trees normally wouldn't be a problem but then turning them all to 5/5s or 6/6s would be a big swing. Like bloodlust but for druid and a lot more expensive.

(10) mana is slow
for (0) mana is way too good

is there a happy medium?

This is really spooky with Kael still around, but we'll see if it's spooky enough to beat the consistency of general spell spamming.

At (10), this is slow, perhaps even for the mana-ramping rulers of the Inn, but 4/4 turns small minions into strong minions, and big minions into giant problems. I do think this'll see play even if its host deck doesn't make it to S/A-tier. Plus: playing big minions feels great. I'll definitely toy around with this in the first few weeks of the expansion.

Looks kind of worthless without Kael’thas, and even then it doesn’t seem that great really

This will improve The Amazing Reno

Not sure about this card ... 

Right now the only thing i can think of that this card will see some play is in Combination with Kael'thas Sunstrider

True ... and the more i think about it, the more i think this will see play - not only for Kael'thas. Could also work in some sort of Big Ramp Druid.

I'm so scared of this card. Druid can cheat mana (ramp and innervate like card) plus Kael'thas Sunstrider...

Big Druid can raise again, but the card is undeniably "slow"...maybe too slow to be used as finisher in some token deck

I'm just waiting this to be cast by Reno to be honest..

If you're playing a Druid deck that cares about buffing your deck, as that's what most targets of Survival of the Fittest will be, why not just run Embiggen instead? Embiggen can be played earlier in the game, allowing for more buffed minions and for those buffs to be more impactful sooner as well as the fact that you don't need a 4 card combo with Kael'thas Sunstrider if you wanted the Survival of the Fittest buffs earlier. Embiggen is just more efficient and consistent for a buff game plan than Survival of the Fittest.

I don't know...

Like, you want this to hit as many Minions as possible, but if you want to make this work with Kael'thas Sunstrider, you'd have to run a considerable Amount of Spells.

Embigger druid. I get the feeling I'm gonna hate playing against this.

This will get nerfed pretty soon

If this gets crazy, this will finally make Kel'thas get the nerf he deserves.

Kael+ this combo is amazing

Really nice card for slow decks, borderline broken

Only with Kaelthas can you make this work. Otherwise, you need to basically get a free turn while having ten mana. Or use Lightning Bloom. 

I'm afraid for my sanity if this sees play in a competitive deck... or decks.

Since ramp Druid is currently viable, I'm scared my fears will come true.

Strong card, but I'm hoping I'm overreacting.

I'm dreading the day when this gets cheated out really early using Innervate and/orLightning Bloom!

Powerful effect but I can’t see it being used all that often.

Spiteful Druid is back! =)

Damn, I love this card. I think it's probably not going to destroy the meta or anything, but it's something I'll certainly be messing around with. Probably in Wild, where you can better take advantage of the effect.

I would say unplayable right of the bat, but Druid time and time again made crap like this works when properly ramped. Blizz said they want to keep ramp in check, but we know the way the cookie crumbles.

Soon Druid will be able to summon a full board of 10/10s on turn 1.

Just run Embiggen. D:

Only playable if you can cheat out early.

Lightning Bloom x2 + Kael'thas Sunstrider + Survival of the Fittest + Innervate x2 + Survival of the Fittest

Profit.

This is a very expensive spell, but that shouldn't be a problem for a druid.

It's not longer big Druid. It's now giant Druid!